Abstract: The present invention relates to a device that includes a radio network control device operable to control a plurality of radio base stations. Also included is a grouping processing unit operable to group into a same group many mobile devices that perform handover to a specific radio base station in a predetermined period. Furthermore, the device includes an identification information notifying unit operable to, when a mobile device performs handover to the radio base station, notify the radio base station of identification information of the mobile device and identification information of one or more other mobile devices belonging to the same group.

Abstract: The present invention relates to a device that includes a radio network control device operable to control a plurality of radio base stations. Also included is a grouping processing unit operable to group into a same group many mobile devices that perform handover to a specific radio base station in a predetermined period. Furthermore, the device includes an identification information notifying unit operable to, when a mobile device performs handover to the radio base station, notify the radio base station of identification information of the mobile device and identification information of one or more other mobile devices belonging to the same group.

Abstract: A data transfer device for a portable telephone which device is capable of achieving efficient and reliable transfer of data and minimizing the influence on vocal communication and restrictions on the availability of added services. When data is to be transferred from data terminal equipment connected to a portable telephone to another data terminal equipment connected to a portable telephone at a remote side of a network during vocal communication, transfer data quantity measuring unit measures the data quantity of the transfer data. Channel selecting unit compares the measured data quantity with a predetermined value, and selects one of a fast associated control channel and a slow associated control channel in accordance with the result of comparison. Using the channel selected by the channel selecting unit, data transfer unit sends the transfer data input from the data terminal equipment to a radio link.